Delphi TC4019 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

OE-Style Front Left Lower Control Arm

Delphi TC4019 is a front left lower suspension control arm and ball joint assembly built for OE-style replacement on select Hyundai and Kia vehicles. It combines an aluminum control arm with a press-in ball joint, pre-greased components, and included bushings for a direct-fit repair on the front left lower position.

Fits 2017-2020 Kia Optima, front left lower. Fits 2015-2019 Hyundai Sonata, front left lower. Delphi TC4019 is a practical choice when restoring steering response, suspension geometry, and front-end stability on these applications.

• Front left lower suspension control arm and ball joint assembly
• Aluminum control arm construction with casting/forged design
• Press-in ball joint with grooved stud
• Pre-greased with bushings, dust boot, and mounting hardware included
• Black rubber bushings and chloroprene rubber dust boot
• Uncoated finish
• Premium grade replacement part
• Steering type: power

Detailed Product Overview

Delphi TC4019 is engineered for OE-level fit and material consistency, using dimensional and material analysis to match the original suspension layout. Delphi subjects its steering and suspension components to temperature extremes and extended salt-spray exposure testing, helping verify durability in demanding road conditions. This part cross-references MOOG Chassis Products RK623733 for the same application.

For Hyundai Sonata and Kia Optima front suspension service, TC4019 provides a complete lower control arm assembly with the ball joint already integrated. The aluminum construction helps maintain the original suspension profile, while the included bushings and dust boot support a clean, service-ready installation.

Common Repair Applications

• Clunking or looseness from a worn lower control arm assembly
• Excessive play in the front suspension ball joint
• Uneven tire wear caused by worn bushings or suspension geometry issues
• Steering wander or reduced front-end stability
• Front-end noise over bumps or during turning

Installation Notes

Verify vehicle fitment by year, make, model, and front left lower position before installation. Because this assembly uses a press-in ball joint design, proper suspension service tools and alignment procedures are recommended after replacement. Delphi TC4019 is not adjustable and is supplied pre-greased for installation.

Quality Assurance

Delphi applies OE-focused engineering and validation to its aftermarket steering portfolio, including dimensional checks and material analysis for fit consistency. TC4019 is tested for temperature resistance and corrosion exposure to support dependable performance in everyday driving conditions.